A Method for Reconstructing the Electric Field Envelope Using the Single Photon Single Ionization Mechanism

Abstract

The invention discloses a method for reconstructing an electric field envelope by using a single photon single ionization mechanism. The method comprises the following steps: S1, a measured single attosecond pulse interacts with a working gas to obtain an electron momentum spectrum, and the electric field envelope distribution Eatto of the attosecond pulse is reconstructed by the least squares method for the electron momentum spectrum; S2, the intensity ratio of the sideband signal and the single photon ionization signal generated different attosecond-infrared electric fields under relative time delay; and S3, according to the attosecond pulse electric field envelope distribution Eatto obtained by the step S1 and the intensity ratio of the sideband signal and the single photon ionization signal obtained in the step S2, the envelope EL0 of the infrared electric field is established by the least squares method. The invention can not only reflect the kinetics process of electrons in the attosecond pump detection experiment, but also reconstruct the envelope distribution of the attosecond pulse electric field and the envelope of the infrared electric field, and does not depend on the carrier-envelop phase with the attosecond pulse and the infrared electric field.

Description

technical field [0001] The invention relates to the field of ultrafast laser technology, in particular to a method for reconstructing an electric field envelope by using a single-photon single-ionization mechanism. Background technique [0002] The rapid development of attosecond science enables researchers to detect the state of electron motion in atoms, molecules and solid matter in real time. Attosecond pumping and detection techniques, such as attosecond fringe camera, frequency-domain interferometry (RABBIT), etc., have been proven to observe the time delay of photoionization emission of electrons, the movement of valence electrons in solids and the self-resonance of electrons. In order to better use the attosecond pump-probe technology to study the dynamics of electrons, the pillars of the attosecond pump-probe experiment, that is, the attosecond pulse and the infrared electric field need to be well described. [0003] The FROG-type method and the method of retrieving...

AI Technical Summary

Problems solved by technology

However, the FROG-type method cannot directly reflect the dynamic process of electrons

The PROOF method and the improved PROOF method (iPROOF) clearly describe the single-photon ionization and two-photon transition process of electrons in RABBIT technology, but the PROOF and iPROOF methods can only reconstruct the attosecond pulse electric field, but cannot reconstruct the infrared electric field.

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